Finding the Fourth Proportional to 1,067.27, 1,472.30 and 830.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.27 : 1,472.30 = 830.79 : x
2. Step 2: Convert to fraction form
   1,067.27/1,472.30 = 830.79/x
3. Step 3: Cross multiply
   1,067.27x = 1,472.30 × 830.79
4. Step 4: Simplify right side
   1,067.27x = 1,223,179.72
5. Step 5: Solve for x
   x = 1,223,179.72/1,067.27
6. Step 6: Final answer
   x = 1,146.09